小型城市景观水体水环境的整治对策——以某高校校园河流为例

以某高校校园河流为例,首先通过布设监测站位评价水环境质量现状,估算水环境容量,然后对前期修复措施的治理效果进行评估,并为后期河流综合治理方案的制定提供建议.调查结果表明:该校园河流Z4区段水体叶绿素浓度高于其他区段,存在暴发藻类水华的风险;对照景观娱乐用水区水质标准,26个站位中总氮浓度超标率为19%,总磷浓度超标率为88%,氮、磷是影响该校园河流水环境质量的关键因素;该校园河流总氮和总磷水环境容量较低,分别为12.38 kg/d和1.05 kg/d.基于前期整治经验,后期应重点针对H2、Z4等区段,集成生态型堤岸构建、水生植被重建和人工湿地处理等水生态修复技术,并通过引调水工程、海绵校园建设和环保意识提升来开展河流综合治理,以确保该校园河流水质达到IV类标准.

Countermeasure Analysis of Water Environmental Remediation in Small-Scale Urban Rivers: A Case Study of a College Campus River

This study explored countermeasures of environmental remediation in small-scale urban rivers via a case study on a river within the campus of a university. The water quality of the campus river was investigated, and the water environment capacities were then estimated. Subsequently, the effectiveness of previous remediation projects in improving the river water quality was assessed, after which some suggestions were presented for a more effective remediation in the future. The study identified one sector (i.e., Z4) with the highest chlorophyll a concentration, indicating a high risk of algal bloom in this sector. Moreover, there were 19% and 88% of the sampling stations, respectively, of which the TN and TP concentrations exceeded the standard level IV. The water environment capacities for TN and TP were 12.38 kg/d and 1.05 kg/d, respectively. Based on these findings, it is suggested to promote environmental remediation measures including restoration of aquatic vegetation and construction of ecological embankment and treatment wetland as well as water diversion project in the campus river, with a special emphasis on the sectors H2 and Z4. Meanwhile, it is also recommended to promote sponge campus construction and campus environmental education projects to achieve more promising performance of the river restoration projects.